If you want to beat the heat this summer, there’s no better way to do that than to explore a cool and beautiful cave.

Missouri is one of the best states to see them. A combination of lots of limestone and plenty of water has honeycombed the state with some 6,000 caves, from tiny little crawl spaces to grand and glorious show caves. One of the most popular is Meramec Caverns in Stanton, Missouri, on Route 66.

Like many caves, it was first used by Native Americans. In the 18th century, French explorers mined the cave for saltpeter, an ingredient used in making gunpowder. Saltpeter Cave, as it was then known, became tactically important in the Civil War. Union troops were stationed there mining the saltpeter until 1864, when Confederate guerrillas attacked them, drove them off, and destroyed the works.

The cave didn’t become a public attraction until the 1890s, when dances were held in the main gallery, appropriately called “The Ballroom.” Showman Lester Dill bought it in 1933, renamed it Meramec Caverns after the nearby river, and opened it to the public. He systematically explored the cave and discovered several impressive chambers. Soon people were flocking to see the stalactites and stalagmites, and beautiful stone drapery that looks like giant curtains. The action of the water depositing minerals on the walls had created amazing shapes and contours on every spot.

%Gallery-158676%Dill decided to create some clever advertising by linking the cave to Jesse James. He claimed it was one of his gang’s hideouts, although James scholars dispute this. The Jesse James/Meramec Caverns legend got a shot in the arm when the public became aware of a man claiming to be the real Jesse James, still alive and spinning a tale about how he faked his own death. Actually this old coot was named J. Frank Dalton and had one time passed himself off as Billy the Kid.

Local booster Rudy Turilli brought “Jesse” to Meramec Caverns to celebrate his 103rd birthday on September 5, 1950. This brought in a huge amount of publicity and Turilli offered $10,000 to anyone who could prove he didn’t have the real Jesse James. The James family took him to court and won. Turilli never paid the $10,000.

The tour and the nearby Jesse James Wax Museum explain this conspiracy theory in detail. The whole experience is fun and a bit cheesy, having the roadside appeal of The Thing? and South of the Border. There’s no denying the natural beauty of the cave itself, and beyond the showbusiness aspect of the place that’s its real appeal.